You need to see the Welcome Guide before you arrive - as soon as possible after the sit is confirmed.
It doesn’t have to be the official THS one .
Why ? Because the morning of your arrival is too late to learn of additional responsibilities not previously discussed ( eg additional pets not mentioned in the listing - more frequent walking of dogs , pets that require medication or have behavioural issues or can’t be left alone )
Many of the “bad” sits discussed on the forum the owner hadn’t provided the WG prior to the sit .
Here is an example